Preview Thumbnails generated incorrectly for a specific set of files

[Volts]

Try setting GenerateBIFKeyframesOnly → 0.

Thumbnail Previews (Roku & iOS) not displaying on 1080P HEVC content / 720P HEVC content and 480P content works

In the Media Info for these items, I assume that “Indexes sd” isn’t present? [image] Yes, Plex can generate video preview thumbnails for HEVC content. It does so by extracting keyframes from the video. There are a few scenarios where unusually encoded videos can prevent this process from succeeding. If you’d like to share a sample file with me, I can confirm or deny that it’s related to the file encoding. Alternatively, you can try changing a hi…

I’m optimistic this will help, but I’d also like to see a sample - repeating the same frame is a different symptom.